Bridge.



No. 685,767. Patented Nov. 5, 190|. C. L. KELLER.

BRIDGE, (Application med Jan. 2s, 1901.) (No Model.)l 3 Sheeis-Shee I.

vacio m: Nonms PETERS co. Pnofoimo. wAsHwamn, n. c.

No. 685,767. Patented Nov. 5, 190|. C. L. KELLER.

BRIDGE.

(Application ed Jua. 28, 1901.)

3 Sheets-Sheet 2.

(lo Model.)

Iwan/o? wie.; z. Maw

UNITED STATES PATENT' OFFICE.

CHARLES L. KELLER, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE SCHERZER ROLLING LIFT BRIDGE COMPANY, OF CHICAGO, ILLINOIS, A CORPORA- TION OF ILLINOIS.

BRIDGE.

SPECIFICATION formingpart of Letters Patent No. 685,767, dated November 5, 1901.

Application filed January 28, 1901. Serial No. 45,085- (No model.) l

T @ZZ whom it may con/cern:

Be it known that I, CHARLES L. KELLER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Bridges, of which the following is a specification:

My invention relates more particularly to bridges employing vertically-moving leaves 1o whose free ends join above the stream, wa-

terway, or ravine when the bridge is closed, although the invention is not limited to bridges whose leaves have a vert-ical movement. y

:5 My primary object is to provide improved means whereby the meeting ends of the bridge sections or leaves may be automatically connected together, so that the stress may be transmitted from either section to the other 2o and so that the sections are held tirmlyagainst lateral movement with relation to each other.

My invention is of particular value when used in connection with a bridge of the type describedin Letters Patent No. 511,713, granted to William Scherzer on December 26, 1893. The invention may be employed, however, in any bridge wherein are employed two moving leaves which have no support at their free ends other than that contributed by each 3o to the other.

In the accompanying drawings, which illustrate my improvements in connection with a bridge of the type shown in said patent, Figure 1 is a View in side elevation showing one bridge section or leaf and the manner in which it is supported at the pier; Fig. 2, a broken plan view showing the manner in which adjacent side trusses of the two'bridgeleaves meet; Fig. 3, a broken longitudinal 4o vertical section showing the meeting ends of adjacent side trusses; Fig. 4, a broken perspective view of a side' truss of one bridgeleaf, and Fig. 5 a broken perspective view of the companion truss of the other bridgeleaf.

A represents the bridge section or leaf shown in Fig. 1, and B a portion of the free end of the companion bridge-leaf. Usually each bridge-leaf is provided with a truss at 5o each side of the roadway7 or road-bed. The

leaf A, as shown, comprises a truss A and a truss A2, and the bridge-leaf B comprises corresponding trusses, of which only a portion of the truss B2 is shown. Each truss A A2 is composed of top chord a, bottom chords 55 als, verticals a5, and diagonals cl2, which are in the case illustrated built up of two channel-irons. Forinstance, for the top chord of truss A2 these channel-irons are marked a and ct. These channelirons are spaced some 6o distance apart and have their flanges turned out or away from each other. The distance between these channels is preserved by tieplates a2 cand ci to a2, inclusive, which are riveted to the flanges ofthe channels. These rivets are shown on plate la2 riveted to the flanges of channels ct and a. At the intersection of non-parallel channel members with each other gusset-plates, as a2 a, are used to make the connections between them. 7o

The vertical members of both trusses A2 and B2 are used for connecting cross-beams h and d, usually I shape and called floorbearns, joining the two trusses, which form each leaf of the bridge. These cross or floor beams support Stringer-beams (not shown) similar in cross-section to the floor-beams c and (l, which in turn support the wooden door and street-car rails (not shown) for highway traffic or live loads. 8o

The general construction and details of each of the trusses A A2 and B B2 are similar, and I have in the drawings applied to Various connecting-plates of the truss B2 the reference-letter c, with index-numerals corresponding to those of the letter b of the truss A2. At the center of the bridge, however, where the two leaves nearly abut, and at the intersection ot' the members, top chord a, diagonal @12, and vertical a5 of truss A2, the de- 9o tail differs from the similar' intersection on` truss B2. On truss A2 a tongue composed in the case illustrated of two channel-irons as and d2, With their iianges turned in or towardeach other, are placed between the channels a and ct of the top chord and riveted to them through the connection-plates a2 and 0.4, which lie between them. The outside or top chord channel-irons ci and a' are cut off and do not extend out to the edge of the connecroo way or railroad traffic, as the case may be.f Y As the two leaves are lowered simultaneouslyY the smooth bottom surface of plate com slides 7`oV i over the top edge of the bearing-plate c7, re'- Y y maining in contact with the same when theV i. Y leaves come to rest and the bridge is closed,VV ,Y and the bottom edges of the ends of the chan# Y' nels Z9 and b clear and pass over the upper 75 edges of the ends of the plate a7, so that when 7 i the leaves come to rest in a closed position .Y the bottoms of the channel-irons c and c' bear i upon the top edge of plate @Fand the ends of.V l the channel-irons d and (t6. Thus a support KV8.o is provided at the end of each truss of each*V Y bridge-leaf for the end of the corresponding 'Y truss of the other bridge-leaf. Moreover, by .Y reason of the provision that the tongue of one ,y truss shall be longer than the projections of V85V f the companion truss the bridge is readily .f closed without the necessity of timing or determining carefully the movements of the two.l bridge-leaves. In other words, it is only nec- 'Y 'fj essary that the leaf compo'sedof vtrusses B B2 V9oz be loweredrin advance of the leaf composed :E i'

tion-plates a3 and a4, but extend over only a portion of the top of the channel-iron vertical members 0,5 and as. The channel-irons as and a9 extend beyond the channel-irons a3 5 and a4, as shown. Their extended portions are bent or curved inward or toward each other and rigidly held in place by top and bottoni tie-plates d10 and d, respectively, riveted to the tianges of the channel-irons, as shown. The rivets in the bottom plate-bearing are countersunk on the under side orcut otf smooth with the bottom surface of the plate, which must present a perfectly smooth surface over all. The detail of truss B2 at its similar point to this differs materially, as shown. The channels c and c' of the top chord of truss B2 are extended and project beyond the edge of the gusset-plates c3 and c4 and beyond the tops of thc channel-iron vertical members c5 and c(7l the same distance the channel-irons ct and a' are cut od.

It will be noted that the tie-plate a2 does not project beyond the ends of the channelirons ct and a', to which ,it is riveted. The

and B2, and the tongues on the leaf A and lowing for expansion, as will be evident fromV x15 the shorter outside extensions on the leaf B Figs. 2 `and 3. Y' 5a and the bearings for said parts are the essen- It will be understood that any vsuitable tial features of the invention. means may be provided for operating` the In operation the bridge-leaf, composed of bridge-leaves and that suitable expedients Y trusses B B2, with the short outside extenwill be employed forY indicating to the opera- 12o edge of the tie-plate c2 is as far back from the end of the channel-irons c and c as the ends of the tongue-channels d8 and a9 extend l Y beyond the tie-plate a2 or the ends of the channel-irons ct and ct', the tieplate @if which is'alsovused as a bearing-plate, affording a bearing-surface with the tops of the channel-irons a5 and a6 for the bottoln surface of the channel-irons c and c when the bridge is closed. Said plate a? is placed so that its top edge, which is faced smooth, extends up to and bears against the bottom flanges of the channel-irons a and ct. The tie-plate c7, which acts also as a bearingplate for the bottom of the tongue composed of the channel-irons a8 and a9 and kplates d10 and au of truss A`l2 when the bridge is closed, is placed so that the top edge, which is faced smooth, is as far below the bottom of the channel-irons b and b' as the plate a on the bottom of the tongue is thick.

The end construction of the trusses A B are respectively like those of the trusses A2 sions of channel-irons b and b', is rst rolled down from an open position of the bridge and stopped just short of a closed position, so that the upper and outside edge of plates a7 on trusses A A2, composing the other leaf of the bridge, which immediately follows trusses B B2 nclosing do not foul the bottom and end edges of channel-irons cand c of truss B2, but so that the bottom surface of the pla-te a,11 comes in contact with and bears upon the top of bearing-plate c7. When this occurs, the two leaves are rolled down simultaneously until both leaves come to rest in a closed position, and the bridge is then ready for highof trusses A A2, and held in such positiony'y'VVV a' within comparatively wide limits, so that the n position.v By reason of the bent or eur'vedJf e side channel-irons d8 and a9 of the tongues the bridge-trusses, and thus the leavesandfxpof rails, are broughtinto perfecthorizontal'aline- L ment as these tonguesenter the sockets'A af-1 Y;

forded between the channel-irons o and cof j thetrussess B B2 of the'opposite leaf.

f the trusses have been Vproperly interlocked'it is VV105 obvious that a lateral play of either truss with relation to the other is prevented andl that'it is not possible for one leaf end to sink below; the level of the other leaf end. This enables,"V 'Y the road-bed to be maintained perfectly level Viro;y

and even, so that where rails are employedY thereon they are kept in perfect alinement.V l

Moreover, the leaves meet in such a mannerVY as to avoid all horizontal stress, thereby a1- tor the relative positions of the bridge-leaves during their movements.

Changes in minor details of construction Y within the spirit ofmy invention may be A made.

shall appear from the appended claims.

Hence no limitation is intended by k'V the foregoing detailedV description except as A from bridges of the arch type, although the 13ndY bent or wedge-shaped tongue may be used to r aline the trusses of the arch type as well, and 1 it is intended where this construction s-e'm'- 4 ployed to so lock the pier ends of the leaves Y or to provide other suitable means that there shall be no tendency for the leaves to swing upwardly after they have been lowered to the closed position.

As is generally known, bridges of the character described have their trusses formed of structural rolled metal, usually steel. By building the interlocking parts ot' met-al of the same general nature a thoroughly safe connection for the bridge-leaves is provided.

What I claim as new, and desire to secure by Letters Patent, is*

l. In a bridge of the class mentioned, having two vertically-swinging bridge sections or leaves meeting at their free ends, a socket carried by one bridge-section and having bottom and lateral bearing-surfaces, an extension carried by the other bridge-section and having tianking bearings, said extension being adapted to enter said socket, and shorter projections upon the first bridge section adapted to rest upon said flanking bearings, substantially as described.

2. In a bridge of the character described, having movable sections meeting at their free ends, a plurality of trusses for each section, each truss having a longitudinal beam built up to aiord a space between the beam members, tongues being provided at the beams of one bridge-section and secured between the beam members thereof, and the spaces between the beam members of the companion trusses being preserved to receive said tongues, substantially as described.

3. In a bridge of the character described, having vertically-swinging sections meeting at their free ends, the combination of a truss for one section having a built-up beam of structural metal, members of said beam projecting beyond the end of the truss and the space being preserved between said members to afford a socket, having lateral and bottom bearings, and a companion truss for the other bridge-section having a builtup beam, a built-up tongue or projection secured between the members of said last-named beam and projecting beyond the end of said truss, and fianking bearings adapted to receive the projecting ends of the members of the companion beam, substantially as described.

4. In a bridge of the character described, having vertically-swinging sections meeting at their free ends, the combination of a truss B2 having a beam formed with members c, c affording a socket between them, uprights c5, c6 connected with said members, a connecting member o7 at the base of said beam, the ends of said members c, c projecting beyond said connecting member, and a companion truss A2 for the other bridge-section having a beam formed with members a, d, a tongue secured between the members d, d and projecting beyond the ends thereof and comprising members CLS, a9, uprights a5, ci@ connected with the members a, a', and a connecting member a7 at the base of said projecting tongue andextending beyond the lateral surfaces thereof, substantially as and for the purpose set forth.

5. In a bridge of the character described, having vertically-swinging sections meeting at their free ends, the combination of a truss provided with a socket, having a bottom and lateral bearings, relatively short extensions for said truss flanking said socket, and a companion truss for the other bridge-section having a tongue adapted to tit into said socket, said tongue having llaterally curved or beveled surfaces, and bearings flanking the base of said tongue and adapted to receive the projections fianking said socket, substantially as and for the purpose set forth.

6. In a bridge of the character described, having vertically-swinging sections, the combination of a truss for one section having a beam formed with channel-beams c, c having oppositely-turned flanges, a socket being preserved between the webs of said beams, abearing for a tongue beneath said socket, and a companion truss for the other bridge-section having a girder formed with channel-beams c, a having oppositely-turned wings, a tongue comprising channel-bars having their wings turned toward each other, said channel-bars .being secured between said last-named channel-beams, and bearings fianking the base of said tongue to receive the projecting ends of the beams c, c, substantially as and for the purpose set forth.

'7. In a bridge having movable sections meeting at their free ends, a plurality'of trusses for each section, the trusses of one section having tongues and bearings flanking the bases of said tongues, and the trusses of the other section having sockets for said tongues and lianking relatively short extensions for engaging the bearings flanking the bases of said tongues, substantially as described.

S. In a bridge having movable sections meeting at their free ends, a plurality of trusses for each section, each truss having a built-up beam formed with members separated by a space, tongues inserted and fixed between the members of each of said beams of one bridge-section, bearings flanking the bases of said tongues, and sockets between the members of each of said beams of the other bridge-sectiom-said sockets having at their bases bearings for said tongues and iianking their bases relatively short eXtensions for engaging the bearings flanking said tongues, substantially as described.

CHARLES L. KELLER.

In presence of- D. W. LEE, ALBERT D. BACCI.

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